import turtle
import math

n = 3
r = 30
turtle.setheading(0)
turtle.left(150)

for y in range(4):
    a = r * 2 * math.sin(360 // 2 * n)
    l = 180 - (180 * (n - 2) // n)

    for i in range(n):
        turtle.forward(a)
        turtle.left(l)
    n = n + 1
    r = r + 5
    turtle.penup()


    turtle.forward(50)
    turtle.pendown()
    turtle.setheading(0)